This whitepaper is for historical reference only. Some content might be outdated and some links might not be available.

# Document Revisions
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| Change | Description | Date | 
| --- |--- |--- |
| [Whitepaper updated](#document-revisions) | Amazon VPC now supports unique local address (ULA) CIDRs and private global unicast addresses (GUA) CIDRs. | August 8, 2024 | 
| [Whitepaper updated](#document-revisions) | Corrected numerous formatting issues throughout document. | April 11, 2022 | 
| [Whitepaper updated](#document-revisions) | Updated content to reflect new feature launches: IPv6-only subnets and EC2 instances, NAT64 and DNS64, and Elastic Load Balancing expanded IPv6 support. | March 31, 2022 | 
| [Initial publication](#document-revisions) | Whitepaper published. | October 26, 2021 |